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ESR identification and conformation of a persistent free radical in the (4+2)-cycloaddition reaction of xanthenethione with phenylallene

✍ Scribed by J. Kamphuis; R.G. Visser; H.J.T. Bos; A. Mackor


Publisher
Elsevier Science
Year
1983
Tongue
French
Weight
221 KB
Volume
24
Category
Article
ISSN
0040-4039

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✦ Synopsis


In the (4+2)-cycloaddition reaction of xanthenethione ,I_ with phenylallene 2 to give


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Formation of a Οƒ-complex from dicyanopyr
✍ Bruno M. Vittimberga; Anne L. Rieger πŸ“‚ Article πŸ“… 2000 πŸ› Journal of Heterocyclic Chemistry 🌐 English βš– 451 KB

## Abstract When a 1Β° or 2Β° alcohol solution of benzophenone and 2,4‐pyridinedicarbonitrile (**1**) is irradiated, the 2,4‐dicyanopyridinyl radical (**2**) is formed immediately. When the irradiation is performed in the cavity of an ESR spectrometer, the spectrum amplitude increases to a near stead